| // Copyright 2014 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| import 'package:flutter/material.dart'; |
| |
| /// Flutter code sample for [InputDecoration]. |
| |
| void main() => runApp(const MaterialStateExampleApp()); |
| |
| class MaterialStateExampleApp extends StatelessWidget { |
| const MaterialStateExampleApp({super.key}); |
| |
| @override |
| Widget build(BuildContext context) { |
| return MaterialApp( |
| theme: ThemeData(useMaterial3: true), |
| home: Scaffold( |
| appBar: AppBar(title: const Text('InputDecoration Sample')), |
| body: const MaterialStateExample(), |
| ), |
| ); |
| } |
| } |
| |
| class MaterialStateExample extends StatelessWidget { |
| const MaterialStateExample({super.key}); |
| |
| @override |
| Widget build(BuildContext context) { |
| return TextFormField( |
| initialValue: 'abc', |
| decoration: InputDecoration( |
| prefixIcon: const Icon(Icons.person), |
| prefixIconColor: MaterialStateColor.resolveWith((Set<MaterialState> states) { |
| if (states.contains(MaterialState.focused)) { |
| return Colors.green; |
| } |
| if (states.contains(MaterialState.error)) { |
| return Colors.red; |
| } |
| return Colors.grey; |
| }), |
| ), |
| ); |
| } |
| } |